let on vs betray

let on and betray both are verbs.

Word	Noun	Adjective	Verb	Adverb
let on	No	No	Yes	No
betray	No	No	Yes	No

As verbs, betray is a hyponym of let on; that is, betray is a word with a more specific, narrower meaning than let on:

let on: make known to the public information that was previously known only to a few people or that was meant to be kept a secret
betray: reveal unintentionally

let on (verb)	betray (verb)
make known to the public information that was previously known only to a few people or that was meant to be kept a secret	give away information about somebody
	reveal unintentionally
	cause someone to believe an untruth
	disappoint, prove undependable to; abandon, forsake
	deliver to an enemy by treachery
	be sexually unfaithful to one's partner in marriage